Thermal Magnetic Circuit Breakers

Thermal magnetic circuit breakers are devices that provide protection against overcurrent in circuits. Circuit breakers use an automatically operated electrical switch to disrupt the flow of current when an overload or short circuit is detected. Thermal magnetic circuit breakers do this using an electromagnet and bimetallic strips. 


Circuit breakers provide more sophisticated protection against overcurrent than a simple fuse. Fuses simply burn out and have to be replaced, whereas circuit breakers just need to be reset.


How do thermal magnetic circuit breakers work?

In thermal magnetic circuit breakers, there are two ways the flow of current might be detected and disrupted. In the event of a short circuit, the electromagnet rapidly trips the switch. If the overload is smaller, over a longer period of time, the bimetallic strips will instead eventually react to trip the switch. 


What are thermal magnetic circuit breakers used for?

Thermal magnetic circuit breakers are most often used in distribution boards. They make up part of the subsidiary circuits in the broader electrical supply system, protecting against overcurrent.


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Omschrijving Prijs Current Rating Number of Poles Range Voltage Rating Width Series Application Break Time Breaking Capacity at Maximum Voltage Rating Circuit Breaker Type Mounting Hole Diameter Mounting Hole Length Mounting Hole Size Mounting Hole Width
RS-stocknr. 899-1664
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FabrikantAltech
€ 20,47
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FabrikantnummerCA1-B0-34-640-121-C
€ 31,06
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40A 1 - - - C General Purpose Medium 5000 A @ 125/250 V dc, 10000 A @ 277 V ac MCCB - 19.3mm 19.3 x 52.37mm 52.4mm
RS-stocknr. 173-9836
Fabrikantnummer4410.0106
FabrikantSchurter
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10A 1 - 240V ac 11.5mm T12 - - - - - - - -
RS-stocknr. 416-691
FabrikantnummerAF1X0038021F2D
FabrikantCarlingswitch
€ 21,56
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- - - - - - - - - - - - - -
RS-stocknr. 286-4165
Fabrikantnummer3120-F521-H7T1-W01D-20A
FabrikantETA
€ 29,60
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20A 2 - - 25mm 3120 - - - - - - - -
RS-stocknr. 782-0889
FabrikantnummerW23-X1A1G-3
FabrikantTE Connectivity
€ 41,91
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3A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS-stocknr. 868-9193
Fabrikantnummer4430.2299
FabrikantSchurter
€ 22,27
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Aantal stuks
15A - - 220 → 240V - - - - - MCB - - - -
RS-stocknr. 728-8645
Fabrikantnummer106-P10-000040-2A
FabrikantETA
€ 14,25
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2A 1 - - - 106 - - - - - - - -
RS-stocknr. 729-2849
Fabrikantnummer3600-P10-Si-4A
FabrikantETA
€ 69,75
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4A 1 - - 11.5mm 3600 - - - - - - - -
RS-stocknr. 868-9049
Fabrikantnummer4430.0031
FabrikantSchurter
€ 15,143
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15A 2 - 60 V dc, 240 V ac - TA45 - - - - - - - -
RS-stocknr. 899-3067
Fabrikantnummer2C1UL
FabrikantAltech
€ 58,00
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1A 2 - 480Y/277V - UL Lighting and Control Circuit Applications, Low Inrush Motors, Receptacles, Resistive Load, UL489 Application, Wiring Protection Time Delay 10 kA MCCB - - - -
RS-stocknr. 284-6101
Fabrikantnummer4410.0106
FabrikantSchurter
€ 19,20
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10A 1 - 240V ac 11.5mm T12 - - - - - - - -
RS-stocknr. 284-5883
Fabrikantnummer4400.0052
FabrikantSchurter
€ 8,48
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12A 1 - 240V ac - T11 - - - - - - - -
RS-stocknr. 849-5945
FabrikantnummerCBC-50HB
FabrikantCooper Bussmann
€ 9,75
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Aantal stuks
50A - - 14V dc - CBC-HB - - - - - - - -
RS-stocknr. 286-4137
Fabrikantnummer3120-F521-H7T1-W01D-10A
FabrikantETA
€ 29,80
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Aantal stuks
10A 2 - - 25mm 3120 - - - - - - - -
RS-stocknr. 323-8983
FabrikantnummerGB2CD05
€ 33,22
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Aantal stuks
500mA 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS-stocknr. 881-4835
FabrikantnummerBA1-B0-34-450-121-D
€ 13,92
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Aantal stuks
5A 1 - - - B Control Panels, Generator and Welder Markets, Marine Applications, Medical Equipment, Military, Office Equipment, Power Supplies Medium 5000 A @ 120 V ac, 5000 A @ 80 V dc MCCB 16mm - - -
RS-stocknr. 899-4537
Fabrikantnummer3C10UM
FabrikantAltech
€ 46,06
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10A 3 - 480Y/277V - V-EA AC Discharge Lamps (Ballast), AC General Use, AC Incandescent Lamps (Tungsten), AC Motor Starting, AC Resistance, Across the Line, Appliances, Business Equipment, Control Circuit Applications, Lighting, Low Inrush Motors, UL508 Application, Wiring Protection Time Delay 10 kA MCCB - - - -
RS-stocknr. 284-5934
Fabrikantnummer4400.0002
FabrikantSchurter
€ 8,74
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Aantal stuks
2A 1 - 240V ac - T11 - - - - - - - -
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FabrikantnummerC1005B-3B101BR3
€ 1,758
Each (In a Pack of 10)
Aantal stuks
10A - - - - C1005B Audio Visual Equipment, Commercial Applications, Generators, Household Appliances, Marine Applications, Medical Equipment, Power Strips, Power Supplies, Telecommunications, Transportation Time Delayed 1000 A - - 14mm 14 x 28.6mm 28.6mm
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